Inspection Procedure 12: The turn-signal indicator lamps do not illuminate.

caution

Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.

COMMENTS ON TROUBLE SYMPTOM

If the turn-signal lamp indicator does not illuminate normally, the harness in the CAN bus lines, connector(s), ETACS-ECU, or combination meter may have a problem.

PROBABLE CAUSES

Malfunction of the ETACS-ECU
Malfunction of combination meter
Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Turn-signal lamp check

Check that the turn-signal lamp flashes normally when the turn-signal switch is operated.

Q. Is the check result normal?

Go to Step 2.

Refer to Inspection Procedure 10 "None of the turn-signal lamps illuminate"

STEP 2. M.U.T.-III CAN bus diagnostics

Use the M.U.T.-III to diagnose the CAN bus lines.

Q. Is the check result normal?

Go to Step 3.

Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting

STEP 3. M.U.T.-III diagnosis code

When the ignition switch is turned to the "LOCK" (OFF) position, check that the ETACS-ECU does not set the diagnosis code.

Q. Is the diagnosis code set?

Refer to diagnosis code chart

Go to Step 4.

STEP 4. M.U.T.-III actuator test for other system

Perform the actuator test for the combination meter, and check that the turn-signal lamp indicator illuminates (Refer to Combination meter

Q. Is the check result normal?

Replace the ETACS-ECU.

Replace the combination meter.